Introduction

Slack adjusters are an important component of a vehicle’s braking system. They are responsible for adjusting the brakes as the brake pads wear down, ensuring that the brakes continue to function properly. Checking slack adjusters is an important part of vehicle maintenance and safety. In this guide, we will discuss why you should check slack adjusters, how to check them, and when to check them.

Why Check Slack Adjusters?

Checking slack adjusters is important for several reasons:

• Ensuring proper brake function: If slack adjusters are not functioning properly, the brakes may not be adjusted correctly, which can lead to decreased braking performance and increased stopping distance.
• Preventing accidents: Properly adjusted brakes are essential for safe driving. If slack adjusters are not checked and adjusted regularly, it can increase the risk of accidents.
• Compliance with regulations: The Federal Motor Carrier Safety Administration (FMCSA) requires that slack adjusters be checked and adjusted regularly. Failure to comply with these regulations can result in fines and other penalties.

How to Check Slack Adjusters

Checking slack adjusters is a relatively simple process that can be done with a few basic tools:

• Wrench
• Tape measure
• Screwdriver

Here are the steps to check slack adjusters:

1. Locate the slack adjuster: The slack adjuster is located on the brake chamber, which is located on the axle of the vehicle.
2. Measure the pushrod stroke: Use a tape measure to measure the distance between the brake chamber and the slack adjuster. This is the pushrod stroke.
3. Check the adjustment: Use a wrench to turn the adjusting bolt on the slack adjuster. If the pushrod stroke decreases, the slack adjuster is properly adjusted. If the pushrod stroke does not change, the slack adjuster needs to be adjusted.
4. Adjust the slack adjuster: Use a screwdriver to turn the adjusting screw on the slack adjuster until the pushrod stroke decreases. Repeat steps 2 and 3 to ensure that the slack adjuster is properly adjusted.

When to Check Slack Adjusters

Slack adjusters should be checked and adjusted regularly to ensure proper brake function and compliance with regulations. The FMCSA requires that slack adjusters be checked and adjusted at least once every 3 months or 30,000 miles, whichever comes first. However, it is recommended that slack adjusters be checked more frequently, such as during pre-trip inspections or after driving in harsh conditions.

Conclusion

Checking slack adjusters is an important part of vehicle maintenance and safety. By following the steps outlined in this guide, you can ensure that your slack adjusters are properly adjusted and functioning correctly. Remember to check your slack adjusters regularly to ensure compliance with regulations and prevent accidents.